import java.beans.IntrospectionException;

public class Demo5 {
    public static void main(String[] args) {
        Thread t = new Thread(() -> {
            while (true)
            {
                System.out.println("hello thread");
                try{
                    Thread.sleep(1000);
                } catch (InterruptedException e)
                {
                    e.printStackTrace();
                }
            }
        });
        t.start();

        while(true)
        {
            System.out.println("hello main");
            try{
                Thread.sleep(1000);
            }catch (InterruptedException e)
            {
                e.printStackTrace();
            }
        }
    }
}
